first trimester
Pregnancy's opening months
The first trimester is the initial three months of pregnancy, spanning from conception through week twelve.
This period involves critical fetal development—major organs begin forming, and the risk of miscarriage is highest.
Morning sickness, fatigue, and hormonal changes are common: She felt exhausted throughout her first trimester.
The term extends to academic contexts where a school year divides into three parts.
- positive testIndication of presence detected
- embryoOrganism before birth
- ultrasoundInaudible high-frequency waves
- implantationEmbedding into tissue
- placentaFetal nourishment organ
prenatal vitamins · obstetrician · organogenesis · hormonal changes · fatigue · anxiety · excitement · bonding · pregnancy announcement · baby names · folic acid · joy · progesterone · amniotic sac · hCG · anticipation · mood swings · early pregnancy
- pregnancy termsnine months, full term, preterm, due date, conception
- prenatal careprenatal vitamins, prenatal care, prenatal checkups, fetal ultrasound, prenatal checkup
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- reproductionreproduction, birth, baby, egg, sperm
- morning sicknessnausea, vomiting, queasiness, dry heaving, retching
- trimesters & termsquarter, term, academic year, school year, fiscal quarter
first trimesterthird trimester
Final pregnancy phase
full term · showing · second trimester · near term · near-term
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